Page 340 - Chemical process engineering design and economics

Separator Design 319

y 2k '-K k x lk ' \ \
(6.21.5 A)

x lk '-y 2k '/K k
(l/A A) Ne =———————— (1-A A )+A A (6.21.5S)
x 2k- yak'/K k

Tray Columns Packed Columns
Column Diameter

D > 2.5 ft D < 2.5 ft

Use Equations 6.23.1 Use Equations 6.23.1 to 6.23.3
to 6.23.6 in Table 6.23 and Equations 6.23.7 to 6.23.9 in
6.21.6T) Table 6.23 (6.21.6P)

Column Height

Z = N A Z T + 3ft + 0.25D + L s Z = N e (HETS) + 3 ft + 0.25 D + L S
LS = V L t s/A — t s = 5 min L s = V L ts/A — t s = 5 min
or L s = 0.06 N A + 2.0 — all terms in or L s = 0.06 N A + 2.0 — all terms in
meters 6.21.71) meters 6.21.7P)

N A = N e/E 0 (6.21.8T)
Z T = f (P) — Table 6.25 (6.21.9T)

System Properties

E 0 = f (u. L, — Figure 6.17 K k =f(T',P')
(6.21.10T) (6.21.8P)

K k = f(T',P') (6.21.1 IT) HETS = 0.5 m — for D < 0.5 m
orHETS = for D > 0.5 m
(6.21.12T) (6.21.9P)
a=10K k
H L =f(T') (6.21.13T)

Copyright © 2003 by Taylor & Francis Group LLC